The Cortebert 307 watch movement was produced in 1895 with a total of 3000 units. It features a hunter calibre, model 3, with a bimetallic screw balance. The movement incorporates a ratchet between plates and a crown mechanism with a rocker bar, which effectively prevents the hands from moving when switching between setting and winding. Additional functions of the Cortebert 307 movement include stem winding and lever setting, as well as a sub-second display. The period of its utilization is approximately around 1886.